Zap't'Balls
Platform: Amstrad CPC
Region: United Kingdom
Media: Floppy
Controller: Joystick, Keyboard
Genre: Action, Arcade
Gametype: Licensed
Release Year: 1992
Developer: Elmsoft
Publisher: CPC Amstrad International
Players: 1 or 2 Co-Op
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Zap't'Balls is similar to Pang. One or two players have 80 screens of balls to clear, by firing a rope vertically so that a ball will hit it. Upon doing this it splits into two balls of half the size, unless it is at the smallest size, at which point it will disappear. Each screen must be cleared within a time limit. Contact with a ball costs the player a life.

Trivia:

Programming

The game is notable for its technical novelties. Amstrad experts would think it was running on a Plus, as what appear to be hardware sprites are moving smoothly at full speed. However, this was accomplished on a stock CPC by forming a stack within video RAM itself, a technique achieved by disabling interrupts.

http://www.mobygames.com/game/cpc/zaptballs
